Features and Benefits

  • Complete Ambient Temperature Sensor Onboard
  • System Power Supply Monitor
  • 10-Bit Resolution Rail-to-Rail Common-Mode Differential Voltage Input
  • Available in 8-Pin SO and PDIP
  • 0.2µA Supply Current When Idle
  • 700µA Supply Current When Sampling at Maximum Rate
  • Single Supply Voltage: 4.5V to 6V
  • 3-Wire Half-Duplex Serial I/O
  • Communicates with Most MPU Serial Ports and All MPU Parallel I/O Ports

Product Details

The LTC1392 is a micropower data acquisition system designed to measure temperature, on-chip supply voltage and a differential voltage. The differential inputs feature rail-to-rail common mode input voltage range. The LTC1392 contains a temperature sensor, a 10-bit A/D converter with sample-and-hold, a high accuracy bandgap reference and a 3-wire half-duplex serial interface.

The LTC1392 can be programmed to measure ambient temperature, power supply voltage and an external voltage at the differential input pins, that can also be used for current measurement using an external sense resistor. When measuring temperature, the output code of the A/D converter is linearly proportional to the temperature in °C. Production trimming achieves ±2°C initial accuracy at room temperature and ±4°C over the full -40°C to 85°C temperature range.

The on-chip serial port allows efficient data transfer to a wide range of MPUs over three or four wires. This, coupled with low power consumption, makes remote location sensing possible and facilitates transmitting data through isolation barriers.


  • Temperature Measurement
  • Power Supply Measurement
  • Current Measurement
  • Remote Data Acquisition
  • Environment Monitoring

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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